Apple Motion 5.1.1 User Manual
Page 865
Chapter 20
Shapes, masks, and paint strokes
865
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Paint strokes do not receive reflections (controlled in the Properties Inspector) unless the
Local 3D checkbox is deselected.
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Paint strokes do not cast shadows (controlled in the Properties Inspector) unless the Local
3D checkbox is deselected.
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Lighting does not effect paint strokes unless the Local 3D checkbox is deselected.
Important:
Even if the Local 3D checkbox is selected, paint strokes do not intersect with the
“global” 3D world. This means that paint strokes can exist in 3D space, but do not intersect
with objects that exist inside their own group, or objects in other groups. A 3D paint stroke is
composited with the rest of the objects in the project based on layer order.
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Face Camera: A checkbox, available when the Local 3D checkbox is selected, that forces stroke
dabs to actively face the camera if the camera is rotated or if the paint stroke is rotated or
animated. When the Face Camera checkbox is deselected, the dabs face forward in the stroke
and appear flat (unless the source layer or paint dabs are rotated in 3D space).
Because paint source dabs are 2D (flat) objects, dabs are not visible when you use the
orthogonal camera views, such as Left, Right, and Top (unless the source layer or dabs are
rotated in 3D space). This is because orthogonal views are at right angles (perpendicular) to
the dabs. For more information on using cameras, see
on page 928.
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Dab Depth Ordered: A checkbox, available when the Local 3D checkbox is selected, that keeps
paint dab ordering consistent when the paint stroke is rotated in X or Y space. When Dab
Depth Ordered is not selected, the dabs jump in front of each other each time the stroke
rotates 180 degrees.
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Jitter: A slider that lets you create a little chaos in your paint dabs. The higher the value, the
more dispersed the dabs become parallel and perpendicular to the stroke’s control points.
Jitter can be animated with keyframes so the dabs behave like particles. Click the disclosure
triangle to display the individual X and Y sliders:
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X: Moves the dabs parallel to the stroke’s curves at control points.
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Y: Moves the dabs perpendicular to the stroke’s curves at control points.
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Jitter Over Stroke: A mini-curve editor that lets you customize the scatter of the dabs over the
length of the stroke. You can create a curve that gradually increases the dabs’ jitter over the
length of the stroke, a curve that varies the dabs’ jitter over the length of the stroke, and so on.
Select or add a keyframe in the graph to make changes using the Jitter Over Stroke and Stroke
Length controls, available under the graph:
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Jitter Over Stroke: A slider that adjusts the amount of dab movement along the X and Y
axes at specific points along the curve. Click the disclosure triangle to reveal individual X
and Y axis sliders, to customize the jitter effect. Drag the X slider to adjust keyframes that
define the amount of dab movement parallel to the stroke’s curve at specific points along
the stroke. Drag the Y slider to adjust keyframes that define the amount of dab movement
perpendicular to the stroke’s curve at specific points along the stroke. Use the Jitter Over
Stroke parameter to adjust the amount of dab movement in both directions at specific
points along the curve (adjusts red and green curve simultaneously).
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